I'm not sure this is so much a hint as it is a fix. By default, iTunes 7 does not appear to be recognizing all audiobooks as audiobooks so that they are listed in the Audiobooks Library (and the Audiobooks playlist on the iPod). This topic has recently been discussed in multiple threads in the iTunes support discussions. The fix is somewhat buried in this thread, although it is not detailed in a single post but spread over several.

First, the tracks must be AAC. Then you need to make sure they have a file type of 'M4B ' -- of course, Doug has a handy script to do this for you. However, even when an AAC file has the file type 'M4B ' and a file extension of .m4b (which isn't necessarily required), the books still may not show up in the Audiobooks playlist or Library.

All you have to do at this point is delete the tracks from your iTunes library (do not delete the actual song files). When you delete a track from the Library, it will ask if you want to keep the files or move them to the trash. Keep the files. Now import them back into iTunes. Voila, they should show up in the Audiobooks playlist. From what I gather, this is the only fix that has worked for many people (including myself).

Good find. I have updated Make Bookmarkable, the script mentioned, to delete and re-add each converted track. Additionally, play counts, rating, last played date, skip count, and skipped date will be preserved.

I have several hundred recordings of radio shows, recorded by Audio Hijack, saved as "Bookmarkable". (I do this because they are two hours each and it is nice to be able to carry on where you last left off. This setting makes the tracks "Remember Playback Position").

I have other ones which are a whole album in a single file, with 'Chapters' to identify each track.

The first set are .m4a files, the second .m4b. In Info/Summary, iTunes incorrectly calls them all "Protected AAC".

Since updating to iTunes 7, these music tracks annoyingly appear in the AudioBooks section and I would like a way to have them back in the Music section.

Thanks for all the input guys. I have audio files that have the m4a extension. I used doug's script and nothing changed. I deleted the tracks from iTunes, then quit iTunes and re-imported the files back to iTunes. None of this has had any impact. Anyone have any ideas?

Totally agree. I cant find my other post, but the script doesnt do anything to my AAC files. I have tried every technique, etc.

My files are not protected, I encoded them using apples AAC codec, and they only allow for automatic settings, so its pretty straight forward.

Here may be the issue...
My CD, I believe had something called gracenotes (could be something else), but itunes scanned the disk that I inserted showing it was looking at something. Perhaps this interferes with the process of the script for getting them into the audiobooks folder?
I would hate to have to re-suck all 80 something tracks and re-label them all again in itunes. (the tracks work, just cant get them in the audiobooks area)

The other is maybe the user needs Quicktime Pro? I dont have it, this may be a glitch somewhere under the hood? Maybe it uses quicktime to resave and since I dont have the pro feature it blocks it? Who knows.

Thanks for the script, though, at least someone is trying to do what apple should made second hand. This is very Microsoftish of them indeed. User friendly...you have an audiobook folder you cant stick anything in. lol